<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8" />
	<title>Document</title>
	<style type="text/css">
	
	#inp{
		width: 50px;
	}
		.inp{
			width: 200px;
		}
	</style>
</head>
<body>
	<input type="text" name="" id="" value="" style="width: 100%;" />
	<input type="button" name="inp" class="inp" id="inp" value="提交" />
</body>
</html>